Hwass in Bruguière, 1792: synonym of Conus ermineus Born, 1778 Conus macarae Bernardi, 1857: synonym of Conus voluminalis Reeve, 1843 Conus macei Crosse, 1865: synonym of Conus mozambicus Hwass in Bruguière, 1792 Conus mackintoshi (Petuch, 2013): synonym of Conasprella mindana (Hwass in Bruguière, 1792) Conus macleayana Tenison-Woods, 1877: synonym of Conasprella rutila (Menke, 1843) Conus maculatus G. B. Sowerby II, 1858: synonym of Conus anemone Lamarck, 1810 Conus maculatus Perry, 1811: synonym of Conus marmoreus Linnaeus, 1758 Conus maculatus Bosc, 1801: synonym of Conus sponsalis Hwass in Bruguière, 1792 Conus maculospira Pilsbry, 1922: synonym of Conus inscriptus Reeve, 1843 Conus maculosus G. B. Sowerby I, 1833: synonym of Conus anemone Lamarck, 1810 Conus madurensis Hwass in Bruguière, 1792: synonym of Conus ventricosus Gmelin, 1791 Conus magdalenae Kiener, 1847: synonym of Conus floccatus G. B. Sowerby I, 1841 Conus magdalenensis Bartsch & Rehder, 1939: synonym of Conus regularis G. B. Sowerby I, 1833 Conus mahogani] Reeve, 1843: synonym of Conasprella mahogani (Reeve, 1843) Conus maltzanianus Weinkauff, 1873: synonym of Conus frigidus Reeve, 1848 Conus mamillaris Green, 1830: synonym of Conus daucus daucus Hwass in Bruguière, 1792 represented as Conus daucus Hwass in Bruguière, 1792 Conus mappa Hwass in Bruguière, 1792: synonym of Conus mappa [Lightfoot], 1786 Conus mappa Crosse, 1858: synonym of Conus eldredi Morrison, 1955 Conus mariei Jousseaume, 1899: synonym of Conus thalassiarchus G. B. Sowerby I, 1834 Conus marinae (Petuch & Myers, 2014): synonym of Conasprella marinae (Petuch & Myers, 2014) Conus marmoreus Perry, 1811: synonym of Conus monile Hwass in Bruguière, 1792 Conus martinicanus Hwass in Bruguière, 1792: synonym of Conus cedonulli Linnaeus, 1767 Conus masoni G. Nevill & H. Nevill, 1874: synonym of Conus caracteristicus Fischer von Waldheim, 1807 Conus massemini (Monnier & Limpalaër, 2016): synonym of Conus daucus Hwass in Bruguière, 1792 Conus mauricioi Coltro, 2004: synonym of Conus ziczac archetypus Crosse, 1865 Conus mauritianus Hwass in Bruguière, 1792: synonym of Conasprella puncticulata (Hwass in Bruguière, 1792) Conus mayaguensis Nowell-Usticke, 1968: synonym of Conus cardinalis Hwass in Bruguière, 1792 Conus mazei Deshayes, 1874: synonym of Conasprella mazei (Deshayes, 1874) Conus mcgintyi Pilsbry, 1955: synonym of Conasprella mcgintyi (Pilsbry, 1955) Conus mediterraneus Hwass in Bruguière, 1792: synonym of Conus ventricosus Gmelin, 1791 Conus melancholicus Lamarck, 1810: synonym of Conus magus Linnaeus, 1758 Conus meleus G. B. Sowerby III, 1913: synonym of Conus boeticus Reeve, 1844 Conus melinus Shikama, 1964: synonym of Conus mustelinus Hwass in Bruguière, 1792